Determination of the Paleoproterozoic Geochronological Framework in Aqtashtagh Area in Southeastern oft-com:office:smarttags" />Tarim , China
详细信息
- 责任者：Xin Houtian (China University of Geosciences ; Beijing 100083 ; China) ; Zhao Fengqing
- 刊名：Acta Geologica Sinica
- 出版年：2011
- 卷期：85(12)
- 关键词：古元古代 ; Paleoproterozoic Era ; 地层格架 ; stratigraphic framework ; 塔里木盆地 ; Tarim Basin
- 页码：p.1977-1993
- 图表：6 illus., 2 tables, 57 refs.
- 分类号：1200
- 出版序号：20122588
- issnNo：ISSN0001-5717
- isbnNo：CN11-1951/P
摘要
A large quantity of Paleoproterozoic metamorphic intrusive rocks and khondalites (in Dunhuang Group) were identified from basal metamorphic rocks in the Agetashtag area, southeastern margin of Tarim Basin. The Paleoproterozoic granite (metamorphic intrusive rocks) differs from the Neoarchean TTG rocks in amphibolite facies metamorphism, non-sodium migmatization, and obvious boundary with Milan Group. In summary, this geochronological framework suggests that the geological development of Tarim craton has some affinity to the North China craton at early pre-Cambrian, and both of them belong to the Nena supercontinent group and involved into the convergence of Paleoproterzoic Columbia supercontinent. oft-com:office:office" />